It's like someone read the New York Magazine Article “Let’s, Like, Demolish Laundry” (http://nymag.com/news/features/laundry-apps-2014-5/) and completely missed the point.
> Grocery and convenience stores aren't always willing to give out more than a few dollars worth of quarters at a time.
Since when did that happen? I live in TO and as long as you buy something from the store, they're always willing to give back change.
I know its not much cash but still... brass balls to run that one.
Idea: arrange for each washing machine to have an email address that you can square cash the money to start it.